SLOSE75B February 2022 – March 2023 TAS2780
PRODUCTION DATA
The typical characteristics for the device are measured using the Bench Evaluation Module (EVM) and an Audio Precision Analyzer. A PSIA interface is used to allow the I2S interface to be driven directly into the Audio Precision Analyzer.
In some measurements (THD+N, ICN, DNR, and so forth), Class-D output terminals are connected to the Audio Precision Analyzer analog inputs through a Differential-to-Single Ended (D2S) filter as shown below. The D2S filter contains a second order passive pole at 120 kHz and an instrumenation amplifier. The D2S filter ensures the TAS2780 high performance Class-D amplifier has its outputs filtered and buffered before processed. This prevents measurement errors due to loading effects of AUX-00XX filter on the Class-D outputs.